CN217327754U - Fan and lifting mechanism thereof - Google Patents

Abstract

The utility model belongs to the technical field of fan equipment, and relates to a fan and a lifting mechanism thereof, wherein the lifting mechanism of the fan comprises a rod body; the sleeve is inserted into the through hole through the rod body so as to be connected with the rod body in a sliding manner; the inner wall of the sleeve is provided with a locking bulge which is detachably connected with the sleeve; the locking piece is arranged on the sleeve; when the locking piece is rotated, the locking piece can drive the locking protrusion to extend to the through hole to radially abut against the locking rod body at the through hole, or retract from the through hole to be far away from the release rod body. The lifting mechanism of the fan can ensure that the locking protrusion can lock the rod body all the time, the phenomena of locking failure, machine body insecurity and automatic rod body sliding caused by insufficient locking force cannot occur, and the lifting mechanism has the characteristics of simple structure and flexible operation, and the assembled parts are simple in structure, small in quantity and convenient to manufacture and install.

Description

Fan and lifting mechanism thereof

Technical Field

The utility model relates to a fan equipment technical field especially relates to a fan and elevating system thereof.

Background

An electric fan is called as fan for short, also called as fan and fanner, it is a household electric appliance which uses motor to drive fan blade to rotate so as to accelerate the circulation of air, mainly used for cooling, relieving summer heat and circulating air, and extensively used in places of family, classroom, office, shop, hospital and hotel, etc.

However, in the prior art, most of common lifting mechanisms used in fans adopt a combined mechanism of a friction plate and a spring to realize locking or unlocking of lifting, the locking force of the mechanism comes from the acting force of the spring, and the mechanism has a complex structure and poor stability during locking; and the magnitude of spring force can attenuate gradually along with the lapse of time, and the phenomenon that elevating system can appear inefficacy, organism is fixed insecure, automatic landing when long-term operation has seriously influenced the normal use of fan.

SUMMERY OF THE UTILITY MODEL

The utility model discloses an aim at, elevating system's structure is complicated in solving current fan, the not high technical problem of easy landing stability after the locking.

In order to solve the technical problem, an embodiment of the utility model provides an elevating system of fan has adopted technical scheme as follows:

this elevating system of fan includes:

a rod body;

the sleeve is axially provided with a through hole and is in plug-in connection with the through hole through the rod body so as to be in sliding connection with the rod body; a locking bulge is arranged on the inner wall of the sleeve and detachably connected with the sleeve;

the locking piece is arranged on the sleeve; when rotatory the retaining member, the retaining member can drive locking protrusion extends to the through-hole is in order to be in the footpath of through-hole supports the locking the body of rod, perhaps follows the through-hole withdrawal is in order to keep away from and loosen the body of rod.

Further, in a preferable scheme of some embodiments, the locking protrusion includes an acting portion and a limiting portion, and the acting portion can be abutted against or away from the rod body under the action of the locking member; the limiting part is connected with one side of the action part, which is far away from the rod body, and is detachably inserted on the inner wall of the sleeve.

Further, in a preferable mode of some embodiments, a side of the acting portion facing the through hole is arc-shaped.

Further, in a preferable scheme of some embodiments, a first receiving groove is formed in the end portion of the sleeve along the axial direction of the sleeve, an installation barrier is formed on the inner wall of the sleeve between the through hole and the first receiving groove, and the installation barrier is detachably buckled with the locking protrusion; one end of the locking piece penetrates through the first accommodating groove and the mounting barrier strip in the radial direction of the through hole, so that the locking piece can be abutted to the acting part.

Further, in some embodiments, in a preferable scheme, the sleeve is provided with a boss protruding outward, the first receiving groove is formed between the boss and the mounting barrier, the limiting part is inserted into the first receiving groove, and the acting part is located on one side of the mounting barrier, which is close to the through hole.

Further, in a preferable scheme of some embodiments, a second receiving groove communicated with the through hole is further formed in the end portion of the sleeve along the axial direction of the sleeve on one side of the mounting barrier strip close to the through hole, and the second receiving groove is used for receiving and avoiding the acting portion.

Further, in a preferable scheme of some embodiments, at a position corresponding to the acting portion, the sleeve is radially provided with a mounting hole for screwing and mounting the locking member, and the mounting hole penetrates through the boss and the mounting barrier and is communicated with the first receiving groove and the through hole.

Further, in a preferable scheme of some embodiments, the locking member is a locking screw, and a locking nut for screwing the locking screw is installed in the first accommodating groove of the sleeve.

Further, in a preferable mode of some embodiments, the locking screw is provided with a handle for facilitating manual rotation, and the handle is arranged at one end of the locking screw away from the acting part.

In order to solve the above technical problem, an embodiment of the present invention further provides a fan, which adopts the following technical solution: the fan comprises the lifting mechanism of the fan.

Compared with the prior art, the embodiment of the utility model provides a pair of fan and elevating system thereof mainly has following beneficial effect:

the lifting mechanism of the fan is detachably provided with a locking bulge on a sleeve, when a rod body rises to a target position, a user manually rotates a locking piece, and the locking piece can drive the locking bulge to extend to a through hole to abut against the rod body in the radial direction of the through hole, so that the rod body is finally locked; otherwise, when the fixed of the body of rod was relieved to needs, the manual loose locking piece of user for the body of rod is kept away from in the locking arch withdrawal gradually, and in order to relieve radially supporting to the body of rod at the through-hole, thereby relieved the fixed to the body of rod.

Thus, the lifting mechanism of the fan adopts the locking bulge, acts on the locking bulge through the locking piece to enable the locking bulge to be matched with the rod body, and is propped against the radial direction of the rod body to realize the locking of the rod body, so that the locking bulge can be ensured not to reduce the locking force along with the time lapse, the rod body can be ensured to be locked all the time, the phenomena of locking failure, machine body insecure fixation and automatic sliding of the rod body due to insufficient locking force can be avoided, the requirements of people are met, and the market popularization of products is facilitated; the lifting mechanism of the fan has the characteristics of simple structure and flexible operation, and the assembled parts have simple structure and less quantity and are convenient to manufacture and install.

Drawings

In order to illustrate the solution of the present invention more clearly, the drawings needed for describing the embodiments will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts. Wherein:

fig. 1 is a schematic perspective view of a lifting mechanism of a fan according to an embodiment of the present invention;

FIG. 2 is an exploded view of the lift mechanism of the fan of FIG. 1;

FIG. 3 is a schematic perspective view of a portion of the lifting mechanism of the fan of FIG. 1;

FIG. 4 is a schematic partial cross-sectional view of the lift mechanism of the fan of FIG. 3;

FIG. 5 is a perspective view of the locking projection of FIG. 3;

FIG. 6 is a partially exploded schematic view of the lift mechanism of the fan of FIG. 3;

fig. 7 is a perspective view of the sleeve of fig. 6.

The reference numbers in the drawings are as follows:

100. a lifting mechanism of the fan;

10. a rod body;

20. a sleeve; 21. a through hole; 22. a locking protrusion; 221. an action part; 222. a limiting part; 23. a first accommodating groove; 24. installing a barrier strip; 25. a boss; 26. a second accommodating groove; 27. mounting holes; 28. locking the nut;

30. locking members/locking screws; 31. a handle.

Detailed Description

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs; the terminology used herein in the description is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention, for example, the terms "length," "width," "upper," "lower," "left," "right," "front," "rear," "vertical," "horizontal," "top," "bottom," "inner," "outer," etc. refer to an orientation or position illustrated in the drawings, which are for convenience of description only and are not to be construed as limiting of the present disclosure.

The terms "including" and "having," and any variations thereof, in the description and claims of this invention and the description of the above figures are intended to cover non-exclusive inclusions; the terms "first," "second," and the like in the description and in the claims, or in the drawings, are used for distinguishing between different objects and not necessarily for describing a particular sequential or chronological order. The meaning of "plurality" is two or more unless specifically limited otherwise.

In the description and claims of the present invention and in the description of the above figures, when an element is referred to as being "fixed" or "mounted" or "disposed" or "connected" to another element, it can be directly or indirectly located on the other element. For example, when an element is referred to as being "connected to" another element, it can be directly or indirectly connected to the other element.

Furthermore, reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the invention. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is explicitly and implicitly understood by one skilled in the art that the embodiments described herein can be combined with other embodiments.

An embodiment of the utility model provides a lifting mechanism 100 of fan, wherein, lifting mechanism 100 of this fan is used for outdoor fan, vertical fan etc. to have support and raising and lowering functions's fan. In addition, the fan of the lifting mechanism 100 to which the fan is applied is usually placed on a supporting platform such as a table top, a floor, a tea table, etc.

As shown in fig. 1 to 3, the lifting mechanism 100 of the fan includes a rod 10, a sleeve 20, and a locker 30. In order to enable the rod body 10 and the sleeve 20 to move relatively, specifically, the rod body 10 can move up and down, a through hole 21 is formed in the axial direction of the sleeve 20, and the sleeve 20 is inserted into the through hole 21 through the rod body 10 so as to be connected with the rod body 10 in a sliding manner.

In the present embodiment, the through hole 21 is opened in the axial direction of the sleeve 20. Preferably, as shown in fig. 3, particularly in the present embodiment, in order to ensure compactness of the overall structure, smooth movement of the rod body 10, and the like, the through hole 21 is located at a central position of the sleeve 20. Of course, in other embodiments, the through hole 21 may be formed along the axial direction of the sleeve 20, but is deviated from the central position of the sleeve 20, which is not limited by the present invention and can be adaptively adjusted by those skilled in the art.

In the embodiment, the sleeve 20 is inserted into the through hole 21 through the rod 10 to be slidably connected with the rod 10. It should be noted that the sleeve 20 can move along the length direction of the rod body 10, and the rod body 10 can also be a telescopic rod. When the rod body 10 is lifted, the sleeve 20 can slide downwards along the length direction of the rod body 10, and the rod body 10 slides upwards relative to the sleeve 20; conversely, when the rod body 10 is lowered, the sleeve 20 slides upward along the length of the rod body 10, and the rod body 10 slides downward relative to the sleeve 20. Therefore, the lifting of the fan is realized, and different requirements of different users on the height of the fan can be met.

As shown in fig. 1, 3 and 4, a locking protrusion 22 is provided on an inner wall of the sleeve 20 to fix the rod body 10 when it reaches a target position. It should be noted that, when a user needs to fix the rod 10, the user can rotate the locking member 30, and under the driving of the locking member 30, the locking protrusion 22 can extend to the through hole 21 and abut against the outer wall of the rod 10 in the radial direction of the through hole 21, so that the locking protrusion 22 can apply an acting force to the outer wall of the rod 10 in the radial direction of the rod 10, and further limit the movement of the rod 10, and the fixation of the rod 10 can be completed.

It should also be noted that the force applied by the locking protrusion 22 to the rod body 10 is not limited to a radial force, but at least a radial force is ensured. In addition, because the locking of the rod body 10 mainly depends on the radial upward propping of the rod body 10, and the lifting of the rod body 10 is along the length direction of the rod body 10, i.e. the locking force acting direction of the locking bulge 22 on the rod body 10 is vertical to the lifting direction of the rod body 10 and the gravity direction (i.e. the falling direction) of the rod body 10, on one hand, the locking of the rod body 10 can be realized by applying a smaller locking force, thereby ensuring that enough locking force is provided; on the other hand, the stability of the locking force is guaranteed, and the locking device is not influenced by the gravity of the rod body 10 and the like.

In addition, the locking protrusion 22 is detachably coupled to the sleeve 20 so that the locking protrusion 22 can be easily disassembled to facilitate timely replacement of the damaged locking protrusion 22. In an alternative embodiment, the sleeve 20 is provided with a connecting portion (not shown), wherein the connecting portion (not shown) is a buckle (not shown) or a slot (not shown) provided on the sleeve 20, and the locking protrusion 22 can be clipped on the sleeve 20 through the connecting portion (not shown). For example, the connecting portion (not shown) is a buckle (not shown) disposed on the sleeve 20, the locking protrusion 22 is provided with a first locking groove (not shown) matching with the buckle (not shown), and the buckle (not shown) is connected with the first locking groove (not shown); alternatively, the connecting portion (not shown) is a slot (not shown) disposed on the sleeve 20, the locking protrusion 22 is provided with a first buckle (not shown) matching with the slot (not shown), and the slot (not shown) is connected with the first buckle (not shown).

After the technical scheme is adopted, the locking protrusion 22 can be stably fixed on the sleeve 20, and the subsequent replacement of the locking protrusion 22 is also convenient. That is, the locking projection 22 can be detached from the coupling portion (not shown) by directly releasing the coupling of the coupling portion (not shown), and the locking projection 22 is not damaged.

In addition, the locking member 30 is disposed on the sleeve 20 and corresponds to the locking protrusion 22, and when the locking member 30 is rotated, the locking member 30 can drive the locking protrusion 22 to extend to the through hole 21 to abut against the locking rod 10 in the radial direction of the through hole 21 or retract from the through hole 21 to be away from the releasing rod 10 when the locking member 30 is rotated.

It should be understood that when the rod body 10 is raised to the target position, the user manually rotates the locking member 30, and the locking member 30 can drive the locking protrusion 22 to extend to the through hole 21 to abut against the rod body 10 in the radial direction of the through hole 21, thereby finally locking the rod body 10; on the contrary, when the fixing of the rod 10 needs to be released, the user manually loosens the locking member 30, wherein the rotating direction of the locking member 30 is opposite to the rotating direction of the locking member 30 when the rod 10 is locked, so that the locking protrusion 22 gradually retracts away from the rod 10 to release the abutting against the rod 10 in the radial direction of the through hole 21, thereby releasing the fixing of the rod 10.

In summary, compared with the prior art, the lifting mechanism 100 of the fan at least has the following beneficial effects: on the one hand, the elevating system 100 of fan adopts locking arch 22, and act on locking arch 22 through retaining member 30 and make it cooperate with the body of rod 10, radially support at the body of rod 10 and realize the locking of the body of rod 10, can guarantee that locking arch 22 can not reduce the locking force along with time lapse, can guarantee to lock the body of rod 10 all the time, can not appear because of the locking force locking inefficacy appears inadequately, the organism is fixed insecure, the phenomenon of the automatic landing of the body of rod 10, satisfy people's demand, do benefit to the marketing of product.

On the other hand, the lifting mechanism 100 of the fan has the characteristics of simple structure and flexible operation, and the assembly parts have simple structure and less quantity, so that the manufacturing and installation are convenient, the working time can be greatly saved, and the manufacturing cost can be saved.

In order to make the technical solution of the present invention better understood, the technical solution of the embodiment of the present invention will be clearly and completely described below with reference to fig. 1 to 7.

Further, as a specific embodiment of some embodiments of the present invention, as shown in fig. 4 and 5, the locking protrusion 22 includes an action portion 221 and a position-limiting portion 222, and the action portion 221 can be pressed against or away from the rod body 10 by the locking member 30.

It can be understood that, when the locking member 30 acts, the acting portion 221 extends to the through hole 21 in the radial direction of the through hole 21, and the acting portion 221 abuts against the outer wall of the rod 10, and the acting portion 221 applies an acting force to the outer wall of the rod 10, so as to restrict the movement of the rod 10 along the length direction thereof, and thus the fixation of the rod 10 can be completed. When the locking member 30 is released, the acting portion 221 gradually retracts away from the rod 10 in the radial direction of the through hole 21 to release the abutment of the rod 10, thereby releasing the fixation of the rod 10.

It should be noted that, the magnitude of the locking force of the action portion 221 to the rod 10 increases with the increase of the distance that the action portion 221 extends to the through hole 21 in the radial direction of the through hole 21, the larger the distance that the action portion 221 extends to the through hole 21 in the radial direction of the through hole 21 is, the larger the locking force is, and the user can select a proper locking force according to the actual situation, so the lifting mechanism 100 of the fan can effectively avoid the phenomena that the lifting mechanism 100 of the fan fails, the machine body is not firmly fixed, and the fan automatically slides off when the fan works for a long time.

It should be noted that, in order to realize the abutting of the acting portion 221 against the rod body 10 in the radial direction of the through hole 21, the acting portion 221 may be entirely offset in the radial direction toward the through hole 21, or one end (specifically, the end connected to the limiting portion 222) may be fixed, and the other end swings in the radial direction toward the through hole 21.

In addition, in order to limit the movement of the action part 221 through the limiting part 222 and enable the locking protrusion 22 to be easily installed (or detached), the operation is convenient, the limiting part 222 is connected with one side of the action part 221, which is far away from the rod body 10, and is detachably inserted on the inner wall of the sleeve 20.

It will be appreciated that when the locking projection 22 is installed, the locking projection 22 is directly inserted into the inner wall of the sleeve 20. In this embodiment, the action portion 221 and the limiting portion 222 are integrally formed, and the limiting portion 222 is a protruding block protruding from one side of the rod body 10 and disposed at the top of the action portion 221, so that the structure of the locking protrusion 22 is simplified, and the integrity of the locking protrusion 22 is improved.

Of course, in other embodiments, the limiting portion 222 may have other shapes, which is not limited by the present invention and can be adjusted adaptively by those skilled in the art.

In the present embodiment, as shown in fig. 5, in order to make the locking protrusion 22 and the rod body 10 adhere to each other more tightly, the acting portion 221 is shaped like a circular arc toward the side of the through hole 21. Understandably, the radian of the arc is the same as that of the outer wall of the rod body 10, when the action part 221 abuts against the outer wall of the rod body 10, the action part 221 can be fully contacted with the outer wall of the rod body 10, a better locking effect is achieved, and the phenomena that the machine body is not firm in fixation and the rod body 10 automatically slides down are avoided.

Further, as a specific embodiment of the lifting mechanism 100 of the fan provided by the present invention, as shown in fig. 4 and 7, in order to reduce the space occupancy rate of the locking protrusion 22, so that the overall structure is compact, the end portion of the sleeve 20 is provided with a first receiving groove 23 along the axial direction thereof. Wherein, between through-hole 21 and first holding tank 23, be formed with installation blend stop 24 on the inner wall of sleeve pipe 20, installation blend stop 24 dismantles the formula lock joint and has had locking arch 22, the one end of retaining member 30 radially passes first holding tank 23 and installation blend stop 24 at through-hole 21 to can with effect portion 221 butt.

It should be noted that, when the locking protrusion 22 is installed, the locking protrusion 22 is buckled on the installation barrier 24, the limiting portion 222 is accommodated in the first accommodating groove 23, and the acting portion 221 is located on one side of the installation barrier 24 close to the through hole 21, so that the locking member 30 can drive the acting portion 221 to extend to the through hole 21 to abut against the locking rod 10 in the radial direction of the through hole 21 or retract from the through hole 21 to be far away from the releasing rod 10.

Further, as a specific embodiment of the lifting mechanism 100 of the fan provided by the present invention, in order to improve the stability and strength of the structure of the sleeve 20, the sleeve 20 is provided with a boss 25 protruding outwards. Wherein, first holding groove 23 has been seted up between boss 25 and the installation blend stop 24, spacing portion 222 pegs graft in first holding groove 23, and effect portion 221 is located the one side that is close to through-hole 21 of installation blend stop 24 to make spacing portion 222 can restrict the removal of effect portion 221.

When the locking member 30 is not operated, in order to avoid the interference of the operating portion 221 with the sliding of the rod 10, a second receiving groove 26 communicated with the through hole 21 is further formed on the end portion of the sleeve 20 along the axial direction thereof on the side of the mounting barrier 24 close to the through hole 21, and the second receiving groove 26 is used for receiving the avoiding operating portion 221.

It should be noted that, when the locking member 30 is not acting, the acting portion 221 gradually retracts away from the rod 10 along the radial direction of the through hole 21, that is, the rod 10 is released from being pushed against, so that the rod 10 is released from being fixed, and the rod 10 can slide along the length direction of the rod 10. The action portion 221 is accommodated in the second accommodating groove 26, so that the action portion 221 and the rod 10 are prevented from moving and interfering when the rod 10 slides, and the use of the product is prevented from being affected.

Further, as a specific embodiment of the lifting mechanism 100 of the fan provided by the present invention, as shown in fig. 4 and fig. 6, in the position corresponding to the action portion 221, the sleeve 20 is radially provided with a mounting hole 27 for the locking member 30 to be screwed and installed, the mounting hole 27 penetrates through the boss 25 and the mounting barrier 24, and communicates with the first receiving groove 23 and the through hole 21, so that the locking member 30 can be screwed and installed on the sleeve 20 through the mounting hole 27, and the locking member 30 can pass through the mounting hole 27 and abut against the action portion 221, thereby achieving the locking or sliding of the rod 10.

In this embodiment, the locking member 30 is a locking screw, and a locking nut 28 for screwing the locking screw 30 is installed in the first receiving groove 23 of the sleeve 20, so that the locking protrusion 22 can lock or release the rod body 10 by the locking screw 30 cooperating with the locking nut 28.

It should be noted that, when the rod 10 needs to be locked, the user rotates the locking screw 30, the locking screw 30 is matched with the locking nut 28, the locking screw 30 performs a feeding motion in a direction close to the action portion 221, after the locking screw 30 abuts against the action portion 221, the locking screw 30 continues to perform the feeding motion, and applies an external force to the action portion 221, so that the action portion 221 moves in the direction close to the rod 10, thereby locking the rod 10, that is, fixing the rod 10 is achieved; conversely, the user rotates the locking screw 30 in the opposite direction to the above direction, so that the locking screw 30 performs a feeding motion in a direction away from the action part 221, thereby releasing the rod 10, i.e., releasing the fixation of the rod 10.

Further, as a specific embodiment of the lifting mechanism 100 of the fan provided by the present invention, as shown in fig. 6, in order to facilitate the manual rotation of the user, the locking screw 30 includes a handle 31, and the handle 31 is disposed at one end of the locking screw 30 away from the action portion 221. It can be understood that when the locking (or releasing) of the rod body 10 is required, the user can manually rotate the handle 31 to move the locking screw 30 toward (or away from) the action part 221, so as to lock (or release) the rod body 10, and the operation is simple and convenient.

Further, as the utility model provides a lifting mechanism 100's of fan a specific implementation way, locking protrusion 22 is for having elastic deformation's locking protrusion 22 to make locking protrusion 22 can be after receiving locking screw 30's exogenic action the motion that is close to the body of rod 10, and after getting rid of exogenic action, locking protrusion 22 can get back to initial position, the reconversion promptly.

In this embodiment, the locking protrusion 22 is a protrusion made of plastic material, and of course, in other embodiments, the locking protrusion may also be made of elastic deformation material such as rubber, and the present invention is not limited thereto, and those skilled in the art can adjust this adaptively.

Based on the above-mentioned lifting mechanism 100 of the fan, the embodiment of the present invention further provides a fan, wherein the fan includes the above-mentioned lifting mechanism 100 of the fan, so that the height of the fan head can be adjusted by the above-mentioned lifting mechanism 100 of the fan, and the fan head reaches the target position.

Compared with the prior art, the fan at least has the following beneficial effects: this fan is through the elevating system 100 who adopts foretell fan, on the one hand, the elevating system 100 of fan adopts locking arch 22, and act on locking arch 22 through retaining member 30 and make it cooperate with the body of rod 10, in order radially to support at the body of rod 10 and realize the locking of the body of rod 10, can guarantee that locking arch 22 can not reduce the locking force along with time lapse, can guarantee to lock the body of rod 10 all the time, locking inefficacy can not appear because of the locking force is not enough, the organism is fixed insecure, the phenomenon of the automatic landing of the body of rod 10, satisfy people's demand, do benefit to the marketing of product.

On the other hand, the lifting mechanism 100 of the fan not only has the characteristics of simple structure and flexible operation, but also has simple structure and fewer assembling parts, is convenient to manufacture and install, and can greatly save the working time and the manufacturing cost of the fan.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention. Various modifications and changes may occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the scope of the claims of the present invention.

Claims (10)

1. A lifting mechanism of a fan, characterized in that the lifting mechanism of the fan comprises:

a rod body;

the sleeve is axially provided with a through hole and is in plug-in connection with the through hole through the rod body so as to be in sliding connection with the rod body; a locking bulge is arranged on the inner wall of the sleeve and detachably connected with the sleeve;

the locking piece is arranged on the sleeve; when rotatory the retaining member, the retaining member can drive locking protrusion extends to the through-hole is in order to be in the footpath of through-hole supports the locking the body of rod, perhaps follows the through-hole withdrawal is in order to keep away from and loosen the body of rod.

2. The lifting mechanism of a fan as claimed in claim 1, wherein the locking protrusion includes an acting portion and a limiting portion, the acting portion can be pressed against or away from the rod body under the action of the locking member; the limiting part is connected with one side of the action part, which is far away from the rod body, and is detachably inserted on the inner wall of the sleeve.

3. The elevating mechanism for a fan according to claim 2, wherein the acting portion has a circular arc shape on a side facing the through hole.

4. The lifting mechanism of fan as claimed in claim 2, wherein a first receiving groove is formed on the end of the sleeve along the axial direction thereof, and an installation barrier is formed on the inner wall of the sleeve between the through hole and the first receiving groove, and the installation barrier is detachably fastened with the locking protrusion; one end of the locking piece penetrates through the first accommodating groove and the mounting barrier strip in the radial direction of the through hole, so that the locking piece can be abutted to the acting part.

5. The lifting mechanism of a fan as claimed in claim 4, wherein the sleeve has a boss protruding outwardly, the first receiving groove is defined between the boss and the mounting bar, the limiting portion is inserted into the first receiving groove, and the acting portion is located on a side of the mounting bar adjacent to the through hole.

6. The fan lifting mechanism according to claim 4, wherein a second receiving groove communicating with the through hole is further formed in the end portion of the sleeve along the axial direction thereof on a side of the mounting barrier adjacent to the through hole, and the second receiving groove is used for receiving and avoiding the acting portion.

7. The lifting mechanism of a fan as claimed in claim 5, wherein the sleeve has a mounting hole along a radial direction thereof for rotatably mounting the locking member, the mounting hole passing through the protrusion and the mounting rib and communicating with the first receiving groove and the through hole.

8. The elevating mechanism for a fan as claimed in claim 7, wherein the locking member is a locking screw, and a locking nut for screwing the locking screw is installed in the first receiving groove of the sleeve.

9. The lifting mechanism of fan as claimed in claim 7, wherein the locking screw is provided with a handle for facilitating manual rotation, the handle being provided at an end of the locking screw remote from the acting portion.

10. A fan characterized in that it comprises a lifting mechanism of the fan according to any one of claims 1 to 9.

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